Reading a txt file: incompatible length error

[distractor (Mitja Jančič)]

I found out that using the getline works way better.

      // Read file.
      {
          ifstream file(filePath + fileName);
          string line;
          // Read by line.
          for (int k = 0; k < Th.nv; k++){
            getline(file, line);
            temperatureField(k) = atof(line);
          }
      }